component
TL3844BDR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownTL3844BDR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-14
TL3844BDR from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | COMP | output | Error amplifier compensation pin. Provides access to the error amplifier output for loop compensation networks between COMP and VFB. Typical high-level output ≥5 V, low-level ≤1.1 V; source ≈0.5 mA, sink ≈2 mA. |
| 2 | VFB | input | Error amplifier inverting input (voltage feedback). Regulated to the internal reference divided down to ~2.5 V. Input bias current ≈ -0.3 µA typ. |
| 3 | ISENSE | input | Current-sense comparator input. Trips the PWM latch at ~1.0 V typ (0.9-1.1 V), providing cycle-by-cycle peak current limiting. Input range 0 V to 5.5 V; propagation delay to output ≈150 ns typ. |
| 4 | RT/CT | bidirectional | Oscillator RC input. External timing resistor to VREF and timing capacitor to GND set the oscillator frequency (up to 500 kHz recommended). Trimmed internal discharge current ≈8.3 mA typ; output frequency is one-half the oscillator frequency on the TL3844B (internal toggle flip-flop). |
| 5 | GND | power_in | Device power supply ground (analog/signal and PWM return). All device voltages are referenced to this terminal. On the 8-pin package, output ground and signal ground share this pin. |
| 6 | OUTPUT | output | Totem-pole PWM output for driving an N-channel power MOSFET gate. Delivers high peak current with rise/fall times ≈25 ns typ (150 ns max) into 1 nF; average output current up to 200 mA. VOH ≈13.5 V @ IOH = -20 mA; VOL ≈0.1 V @ IOL = 20 mA. Held low in UVLO (VOL ≤1.2 V while sinking 10 mA). |
| 7 | VCC | power_in | Device positive supply. UVLO start threshold ≈16 V (14.5-17.5 V), stop threshold ≈10 V (8.5-11.5 V). Absolute maximum 30 V (low-impedance source) or self-limiting for ICC < 30 mA; start-up current <0.5 mA, operating current ≈11 mA typ (17 mA max). |
| 8 | VREF | power_out | Internally trimmed 5 V reference output (5.0 V ±0.1 V at TJ = 25 °C, IO = 1 mA). Sources up to 20 mA (short-circuit current -100 mA typ) for external bias including the RT/CT timing resistor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
TL3844BDRDTL3844BDRTL3844BDRIDRTL3844BDRIDGSRTL3844BDRPTL3844BDRD (14)
CAD (KiCad official)
- Symbol:
TL3844BDR - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
tl3844bdr-etched.step/tl3844bdr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl3844bdr.step/tl3844bdr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
42e42dc7a6e780d9, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).